Log Message:
Update to 0.64

Upstream changes:
0.64 Fri  7 Apr 20:32:01 CEST 2017
 - use lib FindBin::Bin in tests, preparing for perl 5.26 where '.' gets
   removed from @INC. Fixes issue#54 TINITA++
 - Use the latest libyaml sources.
 - Lazy load B::Deparse for faster startup time. Applied PR/53 by
   @perlpunk++ (submitted by @carnil++ from a Debian issue as GitHub
   issue#52)